Halo Evolutions 41

So, on smaller, intact boats similar to the rotten hulks he now skirted, the Shipmaster learned as a boy to move and to fight. Striking and leaping from vessel to vessel, the young warriors learned balance and timing and teamwork as well as
ruthlessness, as not all of the denizens in the lake considered themselves prey. Those boys whose weakness allowed them to be pulled under by cold teeth served as a lesson to the rest that not all Sangheili were worthy. Those who survived the training water emerged hardened both by loss and the determination not to suffer a similar fate in later lessons.-Chpt 14 pg.490